Disk chucking device

Abstract

There is provided a disk chucking device including: a chucking mechanism body installed on a rotor case; a chuck chip movably installed on the chucking mechanism body and fixing a disk thereto; and a spring member installed such that both ends thereof are supported by the chucking mechanism body and the chuck chip, and including a permanent deformation suppressing part provided in a bent portion thereof in order to prevent permanent deformation of the bent portion when the disk is loaded and unloaded and having a smaller pitch than that of other portions.

1 . A disk chucking device comprising:
 a chucking mechanism body installed on a rotor case;   a chuck chip movably installed on the chucking mechanism body and fixing a disk thereto; and   a spring member installed such that both ends thereof are supported by the chucking mechanism body and the chuck chip, and including a permanent deformation suppressing part provided in a bent portion thereof in order to prevent permanent deformation of the bent portion when the disk is loaded and unloaded, and having a smaller pitch than that of other portions.   
     
     
         2 . The disk chucking device of  claim 1 , wherein the permanent deformation suppressing part is wound to have turns in a range of 1.5 to 5. 
     
     
         3 . The disk chucking device of  claim 2 , wherein the chucking mechanism body includes an opening allowing the chuck chip to be exposed outwardly. 
     
     
         4 . The disk chucking device of  claim 3 , wherein the chucking mechanism body includes a chuck chip supporting part disposed under the opening in order to guide the chuck chip by contacting an outer surface of the chuck chip during movement of the chuck chip. 
     
     
         5 . The disk chucking device of  claim 3 , wherein a guiding surface of the chuck chip supporting part is in contact with a contact surface of the chuck chip and has a shape corresponding to that of the contact surface of the chuck chip in order to guide the chuck chip. 
     
     
         6 . The disk chucking device of  claim 3 , wherein the chucking mechanism body includes a coupling protrusion inserted into an inside of one end of the spring member and preventing separation of the spring member. 
     
     
         7 . The disk chucking device of  claim 5 , wherein the chuck chip includes an insertion protrusion inserted into an inside of the other end of the spring member and preventing separation of the spring member.